Just issues

66Plymouth

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Does the car bottom jet looked clogged to you guys. All of a sudden I'm having drivabilty issues. Stumbling/surging/ and total different idle sound. Also noticed the floats level via the windows look off some? The secondary is lower than the primary. Holley 770 carb.



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The float levels for both the primary and secondary should normally be the same, and the secondary fuel level appears too low. There are a lot of things that can cause the symptoms you are describing. The main jets on a Holley carb are in the base of the blue metering plate and usually they do not get clogged unless some very dirty fuel has entered the carb. Check your fuel filter rust or other debris before proceeding further. You can adjust the float levels on this carb without having to remove the fuel bowls. That is the purpose of the adjusting screw on the top of the bowl. Get hold of some new adjusting screw gaskets before trying to mess with the float adjustment because the gaskets usually fall apart when the lock screw is removed and the adjusting nut is turned to set the float level. You have an open vacuum port on the last photo so plug that if it is not hooked to anything. Also note that the idle screws on the metering plate should both be set the same to properly balance the idle mixture, yours are at least a 1/4 turn different. I can not see what the ground strap on the carb base is hooked to but carb bases are a piss poor site to ground any type of electronics, find a bolt to the block some place. Depending on the age of this carb, the accelerator pump might need to have the diaphragm replaced as they get hard over time and do not deliver full fuel flow when the throttle is depressed. Finally, a lot of what can appear to be carb issues are caused by weak spark. If the car still has points, check the point resistance and check the plug gap.

Dave
 
Stubs300, I swear man you must have it for me! Each and every post ive made you've a smart *** comment not related to the question. Are you just some angry old man, did I insult your family some way? Seriously you don't have anything positive or constructive to say about what I post or anybody else don't reply that's simple. I live in Colorado if you would wish to meet up in person we can hash this out and see what the problem is?
 
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